CPU in a Mouse??

[JacoFett]

I have found this (https://www.pccasegear.com/products/33743/cougar-700m-esports-edition-laser-gaming-mouse-black-red) which in my opinion is very bizarre, What does this 32-bit ARM processor do for it? Where do the mouse data signals go to? Is it still the Southbridge or what?

 

[Spectre694]

Pretty much every mouse has some sort of CPU/microcontroller in it.

It is there to convert the optical/laser/rolling ball signals into USB,PS/2 ones and well as store and execute macros and change DPI settings.

Obviously it won't everything for every mouse just the ones with those features.